Gas-mask



W. KOPS.

GAS MASK. AP PL I( IAT ION HLED APR. 25- l9l9. I

Patented Nov. 1, 1921.

2 SHEETSSHEET 2 i IZ'IIIIIII/ PTNT @FFHE.

WALDEMAR KOIS, OF NEW YORK, N. Y.

GAS-MASK.

Specification of Letters Patent.

Patented Nov. 1, 1921.

Application filed April 25, 1919. Serial No. 292,646.

To allwhom it may concern:

Be it known that I, IVALDEMAR Kors, a citizen of the United States,residing in the borough of Manhattan, city, county, and State of NewYork. have invented an Improvement in Gas-Masks, of which the followingis a specification.

In the early production of gas masks, the same were made of flexiblematerial which was therefore collapsible in the use of the mask, and themasks were provided with nose clips to prevent .the wearer frombreathing through the nose and also with mouth pieces to be held in themouth and gripped by the teeth, the mouth pieces being connected to thehose or intake tube so that the wearer was compelled to breathe throughthe mouth. ,In the further development of gas masks, the hood or body ofthe mask was molded out of suitable material over the necessary form inorder to be adapted to fit the face of the wearer and to be suflicientlyrigid to be non-collapsible. In

- masks of this type, the nose clips and mouth pieces were dispensedwith and the hose tube was connected to a deflector for directing theincoming air in such a way as to cause it to strike the interior of thelenses of the eye pieces so as to clarify the same and keep them clear.There were obviously many disadvantages from a manufacturing standpointin the molded gas masks and the object of my present invention is toovercome these disadvantages by producing a gas mask from; suitablematerials worked up from blanks which are so formed and the partsconnected as to make the mask substantially non-collapsible and at thesame time of such a shape as to properly. fit the face of the wearer. Inso doingfIpreferably employ an outer blank of relatively stifi' materialand an inner blank of relatively flexible material. The outer blank issuperimposed upon or otherwise connected with the inner blank andconnected thereto and the blanks. stamped out with gores or V-shapedincisions in the required positions and the parts thus made suitablyconnected as hereinafterdescribed to form the hood.

= ted w1th a tape '23 which is suitably secured or body of the mask. Inthe drawing: Figure 1 is a perspective View of the hood of a gas maskmade in accordance with my present invention.

Fig. 2 is a side elevation of the mask before the same is completed.

Fig. 3 is a plan view of the blanks from which the hood of the mask ismade, and

Fig. 4 is a section on line 4-4:, Fig. 3.

Referring particularly to the drawing, .it will be seen that in carryingout this invention, I employ a blank or sheet of material indicated at10, and this is preferably a relatively stifl impermeable rubberizedfabric such as rubberized duck or sail cloth. I also employ a blank orsheet of material indicated at 11 which is made of flexible material,such for example, as double stockinet. The blank 11 is appreciablylarger than" the blank 10 and the blank 10 is preferably superimposedupon the blank 11 in substantially the position shown in Fig. 3, and theparts cemented to one another and also stitched. along the edge of theblank 10 as indicated by the lines of stitching 12, or as will beunderstood, these blanks may be otherwise suitably connected to eachother so that the blank 10 in use is the outer blank and the blank 11the inner blank. After the blanks 10 and 11 are thus secured to oneanother, the eye. piece openings 13 are suitably cut therein andpreferably slitted for appreciable distances as indicated at 1 1. In theblanks there is also cut an opening"15 for the hose tube of the mask andan opening 16 for connecting the flutter valve in position in thehood ofthe mask. Furthermore, in the mask blanks as herein before describedthere are also cut darts or or gores or ll-shaped incisions 17 and 18adjacent the eye piece sections of the hood, and darts or gores orV-shaped incisions 19 and 20 in the lower or chin section of the blank.

The edges of the darts or goresare then zigzagged as indicated at 21 and22 in Fig. 2, the former representing the zigzag edges in the eye piecedarts or gores and the latter the zigzag edges of the gores in the chinsection, and as illustrated in Fig. 2, these zigzag edges of the goresare brought together and secured to one another in any suitable mannerto form the, hood of the mask. The edge of the blank 10 is then fit- 15and the flutter valve 28 secured in theopening 16. Also interiorly,the'hood of the mask maybe provided with a band or lining secured to oradjacent theedge'thereof to form the joint between-the hood and the faceof the wearer, and if. necessary," this form-of mask may also beprovided with a chin piece. v

It will be understood that the relatively stiff impermeable fabric usedin the blank 10 when the mask is made as hereinbefore described, givesthe hood suflicient rigidity to be substantially non-collapsible, andfurthermore, that any suitable connections may be made for the hose tubeand flutter valve and. that any desired type of harness-maybe employedfor securing the'hood or'body of the mask in position on the head of thewearer. A jm j V I claim as-my invention:

1. A gas mask made of blanks of flexible material, superimposedtoreinforce the body of the hood of the mask and thereby prevent theentire front section of the hood from collapsingwhen in use and also toprovide a border section'which is sufliciently yielding to permit a gastight fit to be made between the same and the head of the wearer, thesaid blanks being provided with symmetrically'placed incisions in theedges mo els? thereof which are connected by a suitable joint tocompletely form the hood of the mask.

. 2. A gas mask made frorna blank of' relatively flexible material and ablank-of;

relatively stiff material, superimposed upon the blank ofjrelativelyflexiblematerial. so

as to reinforce the entire front section-j of the hood ofth'e mask inorder to prevent the same from collapsing and to cause'the'iztendingportion ofthe blank of flexible ina-' terial to providea border sectionwhichis tively stiff material superimposed' upon the blank of relativelyflexible inaterial's'o as; to

made from a banker aa- I reinforce. the entirefront section ofafthe hoodofthe mask in. order to prevent the same from collapsing "and to cause;the'extending pdrtion of the blank. of flexible material to provide aborder section-which,

is sufliciently yielding'td eifect a' gas tight fit'between the same andthe head 'ofthe wearer, the said blanks being provided withsymmetrically placed incisions in-the sides thereof adjacent,- the eyesections, and also with symmetrically placed incisions inthe lower edgesthereof, the edges 'ofs'jaidhim cisions' being connected by suitable-j'oints' to completely-form the hood of the mask;

Signed by me this 21st day of April, 1919.

- WALDEMAR KOEPS.

